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+2 Thiosulfuric acid Na2S,O +2.5 Tetrathionic acid NasAo Sulfurous acid Na2SO3, SO2 Disulfuric acid. sulfuric acid SO3, Na2S2O7 +6 Persulfuric acid H,S,O8 1. Hydrogen sulfide 1)Colorless gas, stinky poisonous gas CH3CSNH2+2H20=CH3 Coo +NH4 +H2St CH3CSNH220H=CH3 CO0+NH4 +S 2)Weak acid 3)Reducing properties 2H2S+O2=2S↓+2H2O 2H2S+3O2=2SO2↑+2H2O 2Fe3+H2S=2Fe+S↓+2H H2S+I2=2HI+S↓ H2S+Cl+ 4H20= H2SO4+ 8HCI 5H2S+8MnO4+24H=8Mn++ 5H2SO4+12 H2O 2. Sulfides 1) Solubil Acid salt: dissolve Normal salt s2:s2-+HO→HS+OH 3 A1 S3, Cr2S3 Complete hydrolysis) Al2S3+6H2O=2AlOH)3↓+3H2S↑ Cr2S3+6H2O=2Cr(OH)3↓+3H2S↑ Dissolve Insoluble. but dissolve in following solutions hydrolysis 第15页 2006-02-22第 15 页 2006-02-22 15 +2 Thiosulfuric acid Na2S2O3 +2.5 Tetrathionic acid Na2S4O6 +4 Sulfurous acid Na2SO3, SO2 +6 Disulfuric acid, sulfuric acid SO3, Na2S2O7 +6 Persulfuric acid H2S2O8 1. Hydrogen sulfide 1) Colorless gas, stinky poisonous gas CH3CSNH2+2H2O=CH3COO- +NH4 + +H2S↑ CH3CSNH2+2OH- =CH3COO- +NH4 + +S2- 2) Weak acid 3) Reducing properties 2H2S + O2 = 2S↓ + 2H2O 2H2S + 3O2 = 2SO2↑ + 2H2O 2Fe3+ + H2S = 2Fe2+ + S↓ + 2H+ H2S + I2 = 2HI + S↓ H2S + Cl2 + 4H2O = H2SO4 + 8HCl 5H2S+8MnO4 - +24H+ =8Mn2++ 5H2SO4+12 H2O 2. Sulfides 1) Solubility: ○ 1 Acid salt: dissolve ○ 2 Normal salt 2) Hydrolysis: ○ 1 S2-: S2- + H2O ↔ HS- + OH- ○ 2 Al2S3, Cr2S3 (Complete hydrolysis) Al2S3 + 6H2O = 2Al(OH)3↓ + 3H2S↑ Cr2S3 + 6H2O = 2Cr(OH)3↓ + 3H2S↑ Dissolve Insoluble, but dissolve in following solutions Hydrolysis
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